One English phrase we often use to describe happiness is to say 'she took to her bike like a fish to water'. Or in reply to the question 'How is he enjoying his piano lessons going?' we could say 'like a fish to water'. It means he or she feels perfect in the (new) situation, just like a fish placed in water would feel.
The situation when I feel 'like a fish to water' is when I am in the element of water. Whether I am swimming, floating, or only dangling my feet in it, I feel joy and happiness when I am in natural water sources, such as lakes, rivers or seas. Of course it helps that I live in the alpine lake region of Europe, where the water in natural lakes is clear and unpolluted (= not dirty).
Being submerged (= underneath and surrounded by something completely) in water in nature makes me feel like a part of something bigger than myself. It might even remind me of being in my mother's tummy before I was born, but that idea is a far stretch (= unlikely). In any case, water surrounding me gives me endless joy and comfort!
If you are interested in chatting about what brings you joy, happiness or what concerns you, please book a lesson with me!